Answer:
2q+6
Step-by-step explanation:
So basically, you would do this.
-2q-6+6q+12-2q
Next
-4q+6q = 2q
12-6=6
7000
21000/0.667
=14000
21000-14000
=7000
9
27:
1,3,9, 27
18:
1,2,3,6,9, 18